Improvement in vehicle-springs



G. P. MULDOON & E. P. DAVIS. Vehicle-Spring.

No. 202,858. Patented April 23, 1878.

INVENTOR ATTORNEYS Il ill!!! III!!! 4 I! II UNITED STATES PATENT OFFICE.

GEORGE P. MULDOON AND EDGAR P. DAVIS, OF OMAHA, NEBRASKA; SAID DAVISASSIGNOR TO SAID MU'LDOON.

IMPROVEMENT IN VEH ISLE-SPRINGS.

Specification forming part of Letters Patent No. 202,858, dated April23, 1878; application filed December 18, 1877.

To all whom 'it may concern:

Be it known that we, GEORGE P. MULDooN and EDGAR P. DAVIS, of Omaha, inthe county of Douglas, and in the State of Nebraska, have inventedcertain new and useful Improvements in Vehicle-Springs; and do herebydeclare that the following is a full, clear, and exact descriptionthereof, reference being had to the accompanying drawing and to theletters of reference marked thereon, making a part of thisspecification.

The nature of our invention consists in the construction and arrangementof a vehicleipllllllg, as will be hereinafter more fully set 'ort Inorder to enable others skilled in the art to which our inventionappertains to make and use the same, we will now proceed to describe itsconstruction and operation, referring to the annexed drawing, whichrepresents a side elevation of our invention, with certain parts insection.

A A represent two wooden springs, curving in opposite directions, andhaving their ends connected together by ferrules B B, or otherequivalent means. Through each ferrule B, between the ends of thesprings A A, is passed a rod, O, passing through a washer or plate, a,against the outer end of the ferrule, and a nut, b, is screwed on theouter end of the rod. The inner ends of the rods 0 (J are provided withheads d d, and inserted from opposite ends in a cylindrical casing orsleeve, D, the ends of which are closed by hollow screwplugs h h, therods 0 O passing through said hollow screw-plugs. Within the sleeve orcasing D, one or both of the rods 0 is provided with a spring, 2',either in spiral form or of rubber, said spring surrounding the rodbetween the head (1 on the end thereof and the screw-plug h.

The spring or springs 6 increase the tension or resistance of the woodensprings A A, and the more weight is placed on said springs A the moreare the springs c contracted and the resistance increased. The tensionof the spring or springs 71 is easily regulated by means of the nuts b12 upon the outer ends of the rods 0 0.

Having thus fully described our invention, what we claim as new, anddesire to secure by Letters Patent, is-

1. The combination, with the springs A A having their ends connected byferrules B B, of the rods 0 0, having their inner ends surrounded byaclosed casing, D, and a spring, i, placed around the inner end of one orboth rods, within the casin g, forthe purposes herein set forth.

2. The sleeve D, with hollow screw-plugs h h, rods 0 O, with heads d d,one or more springs, i, and the regulating-nuts b b, all constructed asdescribed, and combined with the springs A A and ferrules B B,substantially as and for the purposes herein set forth.

In testimony that we claim the foregoing we have hereunto set our handsthis 7th day of December, 1877.

GEORGE P. MULDOON. EDGAR P. DAVIS.

Witnesses:

J. W. LOVE, WM. L. PEABODY.

